A custom canvas that displays a thermometer. A driver that demonstrates how it works.

This is the output produced.

Some things to note:

• The setters and construtors verification of displayable data for the temperature.

• The drawing of the thermometer relative to the size of the canvas on which it is diplayed.

• the use of the class Font and the methods setFont() and the use of the class FontMetrics and the method getFontMetrics() determine the string width via the method stringWidth() to center the thermometer title.

• Note that the outline of the thermometer is drawn afer the stalk and the bulb are filled. If drawn first, the filling would draw over the outlines.